Nut-lock.



UMTED .i STATES.

ELU/in P.. PARKHURST,

or CHICAGO, I'LLrN .MARSHALL-or CHICAGO, ILLINOIS. 1

)P ADENT OFFICE..

01s, AssIeNCR or CNE-freien To JOHN w.v

NUT-1.00K.

'Nol 894,693.

Appiicaaon' fumi may 29,1907. serial-No. 376,290.

l To all whom it may concern: l

v a citizenof the, United States, residing at vbe comparatively easy andfinexpensive to` Be it known that'I, ELIJAH R. PARKHUR'ST,

Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Im' provements in Nu1Lo cks,vv of which the fol.

lowing-is aspeciication.- y

This invention relates'toa nut lookin device, which is in the nature of a washerliaving laterally bent barbs, which, when thenut is drawn up tight on thebolt, will straighten out the barbs andcausethem tobiteinto the threads of' the. bolt.`

a The invention'has for one'of its,` objects to improve and simplify the construction and operation of devices of this characterso as tov great holding power.

manufacture, `readilyA applied and having A further object of the invention is the-pro# vision of a nut lockm'g'device 1n the form of a washer. havingmwardly extending barbs disposed. in tangential relation tothe surfaceto trate one of the -e1-nbodiinents ofthe inventwin-Figurel 1 is a side elevation of a bolt for clamping tw'o members together, the n ut' I locking device being shown in section, anut secured only partially on the bolt. Fi

i" nut locking device.

. 2 is a similar view showing the nut secured tightly ,l on the bolt. Fig. 3 1s an end view showing thenut locking device bent over1 two'of the sides of the nut. Fig. 4 isa rear v iew'of the Similar reference characters are employed to designate corresponding parts throughout the several v lews.

Referringto the drawing, 1. designates. a

-bolt of any approved construction for securl ing 'parts to ether s uch .as members 2 and and 0n the Y my am. The un flocking en@ @ma S'pecication of `Letters Patent.

` Patented July 28,1908.

. prises a was'her-likedisk 6 of metal having a central opening 4 7 from which extend approximately tangentially disposed 'slots 8, as

shown in Fig. 4, for forming tangential barbs i.

9. These barbs are pressed rearwardly so as to permit the nut'locking device to freely pass over the threads of the bolt. The side of vthe washer-like member 6 and surface is roughened as indicated by the lines in Fig. 4

so that when the' nut 4 is drawn lhome the roughenedsurface will grip the member 3 and preventjthe nut locking Vdevice from turmng.

The periphery of the nut locking device 6 1s serrated aslindicated at 10 and these teeth or serrations permit of the nut locking device to be drawn back over the sides of the nuts, as .indicated at. Fig.'` 3, the serrated periphery being preferable since the nut locking device canl be sed in connection with square,. hex

agonal or any other form of nut,since the nut locking device can be bent to conform to any nut.

In practice, the bolt is passed through the and the nut locking device threaded on the bolt with the barbs 9 presented to themem bers to befclampcd, as shown in Fig. 1.

Amembers intended to be fastened together The nut 5 is secured on the .bolt and as it is drawn I as shown in Fie. 2 and caused to grip the threads of`the bolt and also the roughened `surface of the nut locking device, is caused to tightly engage the outer surface of the member 3. After. the nut is secured tight,v the lnut lo'ckingdevice is bent outwardly at' its periphery, as indicated inFig. 3, so as to bear against any one or all of the sides of the nut and prevent the latter from turning. The

bends of. the washer are produced on chordal lines and the teeth of the bent-out portion .or .portions-are pre sed against the nut and the This eiect is accomplished in art'by .reason of the frictional engagement o the Ifu't lockfectivel resist any tendency to .un'scxjew nut an 111.112 the ll0 fthe-bult.

the

by an unscrewing moyementfefgthe* es wovldftend "ejb-ite @tenerme tightly biplace, the barbs 9. vare straightened,

l-apeXes of 'the -t eth are disposed inwardly with respect to the outer face of the nut..

-1'00 ing device with themember, and.n also by means of the prongs 7 .being buried into the y threads ofthe bolt. Since the barbs are ar-v l ranged in tangentialv relation they ;more efrf ,to those skil l' tion appertains and while I have described l*the principle of operation of the invention tothe.' advantages of the construction and method of o eration will be readily apparent ilad in the art to which the invengether wlth the device, which I now consider to be the bestembodiment thereof, I

desire to have it understood that the device shpwn is merely illustrative and that such la bolt passing throuvh t olt, and a nut vloe in .comprising a washer-li changes may be made when desired, as are invention, whatl The combination of a luralit of members,

e same, a nut on the device, said device e body of bendable ssefees metal and provided with internal and extei nal teeth, said teeth havinnr their inner ends disposed in concentric cirees, and the inner teeth being arranged ap )roxiinately in tangential relation to the bo t, and oi such length as to bite into the latter, the said body belng bent outwardly against one or more sides of the nut, the bends of the body being dis- Eosed in chordal lines and the teeth of the ent-out portion or portions being;r disposed against the nut and having their apexes lying below the outer face of the latter.

In testimony whereof, I ailix my signature in presence of two witnesses.

ELlJAI-l R. PARKHURST. Witnesses:

JOHN W. MARSHALL, LOUIS J. HERowrrz. 

